Lectrosonics UCR411 User Manual download pdf (Page 5)

UHF Wireless Digital Hybrid

Receiver

RF-CONTROLLED DIGITAL NOISE FILTER

In addition to SmartNR, the UCR411 contains an RF

sensitive variable frequency filter, which reduces high

frequency response under extremely weak RF condi-

tions. This filter does nothing until the RF signal strength

drops below 3 uV at which point it begins to roll off high

frequencies. Usable audio remains unaffected, but

noise-ups or “hits” occurring near the fringe of reception

sound much less harsh.

OUTPUT LEVEL ADJUST

One of several setup screens is provided for adjusting

the audio output level in 1dB steps from -50 to +5dBu

using the UP and DOWN buttons on the front panel.

TEST TONE

The UCR411 provides a 1kHz audio test tone at the XLR

connector for level adjustment of connected equipment.

The level is adjustable from -50 to +5 dBu in 1 dB steps

to allow a precise match.

BATTERIES

The UCR411 operates on two 9V alkaline or lithium

batteries. Access to the battery compartment is gained

by lifting one end and turning the rear panel door. NOTE:

Do not use an alkaline and a lithium in the same unit.

Standard or “heavy duty” batteries are not recom-

mended.

POWER SUPPLY

The UCR411 may be operated from an external DC

power source (see Specifications and Features section

for allowed voltages.) The receiver has a built-in Poly-

Fuse to protect the unit. This fuse resets if the power

supply is disconnected for about 15 seconds. The power

section also has protection circuits that prevent damage

to the receiver if a positive ground power source is

applied.

LCD DISPLAY

The display has four main windows. Pressing the MENU

button rotates through each of these windows.

If the battery gets low on either transmitter or receiver, a

message will interrupt the display every few seconds and

flash a low battery warning.

After power is turned off and back on again, the unit

defaults to the main window and to the most recent

frequency, audio level, transmitter battery type and

locked/unlocked status settings. These settings are

retained even if the batteries are removed.

POWER UP SEQUENCE

The power-up sequence consists of four messages that

appear automatically over a period of a few seconds

after the power is switched on.

1) LOCKED or UNLOCKED status

2) The name LECTROSONICS

3) The model number and firmware revision numbers

4) The frequency block of operation

After these introductory messages are displayed, the

main window will appear.

The UCR411 is fully operational during the power up

sequence and will immediately respond to button pushes

made before the automatic sequence is completed. If a

valid transmitter signal is already present when the

receiver is turned on, the audio output will typically be

engaged somewhere in the middle of the power-up

sequence, following a brief delay to allow the audio

circuits to stabilize.

(See LOCKING AND UNLOCKING THE UCR411.)

POWER OFF

When the power switch is moved to the OFF position the

audio output is instantly muted (squelched) and the

message “POWERING OFF...” is displayed briefly before

switching off.

Rio Rancho, NM – USA

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Lectrosonics UCR411 User Manual Page 5

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